public class Example3_1 {
	public static void main(String args[]) {
		char a1 = '十',a2 = '点',a3 = '进',a4 = '攻';
		char secret = 'A';
		a1 = (char)(a1^secret);
		a2 = (char)(a2^secret);
		a3 = (char)(a3^secret);
		a4 = (char)(a4^secret);
		System.out.println("密文："+a1+a2+a3+a4);
		a1 = (char)(a1^secret);
		a2 = (char)(a2^secret);
		a3 = (char)(a3^secret);
		a4 = (char)(a4^secret);
		System.out.println("原文："+a1+a2+a3+a4);
	}
}
